/// <summary>
/// Returns all statements before the specified statement within the containing method.
/// This method recursively traverses all parent blocks of the provided statement.
/// </summary>
public static IEnumerable <StatementSyntax> GetPreviousStatements(this StatementSyntax statement)
{
var previousStatements = statement.GetPreviousStatementsCurrentBlock();
return(statement.Parent is StatementSyntax parentStatement
? previousStatements.Union(GetPreviousStatements(parentStatement))
: previousStatements);
}